Session KP01 - Poster Session III.
POSTER session, Tuesday afternoon, March 23
Exhibit Hall, GWCC
We have written a separate code for the GRASP2 program to perform small-sized Configuration Interaction (CI) calculations for the Parity Non-Conserving (PNC) amplitudes. Our calculations of the amplitude arising from neutral weak currents in the even isotope of FrI agree well with an older calculation(Dzuba, et al, Phys. Rev. A, v. 51, num. 5, p. 3454, 1995). The importance of nuclear size, Breit and QED effects has been explored. These corrections play a crucial role in the precise calculation of the weak interaction amplitudes. Furthermore, the role of the dominant configurations is discussed in the investigation of the correlation effects for the PNC amplitudes. The result of parity nonconservation in FrI is 1.44 \times 10^-10 iea_o(-Q_W/N). We hope to improve low order results in the near future by performing larger-sized CI calculations to provide evidence of fundamental processes in the weak interaction sector as the progress in the PNC measurement in francium is made. We will also extend our approach to calculate PNC in other atoms and ions, such as Ba+.